Tree 8-10m tall, about 3m from old farm pond.
No interactions present.
The leaf in the photo has the shape of Italian alder (Alnus cordata). The leaf of grey alder is much more ointed and serrated. Grey alder tends to like drier sites, (planted on reclaimed tips).
I was trying to identify an Italian alder see http://www.ispot.org.uk/node/6554
Look to see if there are any short tufts of orange hairs on the midrib of the leaf that will tell whether it is Italian.
Wildlife of Assynt
Lat/Lng: 52.6, 0.9
OS grid ref: TF9712